Novel superconducting magnet conduction cooling structure

Abstract

The invention discloses a novel superconducting magnet conduction cooling structure, which belongs to the technical field of superconducting motors and comprises a first copper plate, a second copper plate, a connecting copper block and a copper braid. The first copper plate and the second copper plate are oppositely arranged on the upper surface and the lower surface of the superconducting magnet to form a magnet supporting and cooling framework; connecting copper blocks are symmetrically arranged on the two sides of the framework. The connecting copper blocks are symmetrically arranged on the two sides of the framework, each connecting copper block comprises a supporting part and an expanding part, each supporting part is arranged between the corresponding first copper plate and the corresponding second copper plate, and each expanding part is arranged on the outer side of the corresponding supporting part and bends and extends towards the bottom of the corresponding second copper plate; and the two ends of the copper braid are connected with the symmetrically arranged expansion parts of the connecting copper block. According to the structure, the utilization of a cooling medium is greatly enhanced, the cooling effect is obvious, the structure is simple, machining is easy, and cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of superconducting motors, and more specifically, relates to a novel superconducting magnet conduction cooling structure. Background Art

[0002] Superconducting motors have great application prospects in aviation propulsion, ship propulsion and wind power applications due to their advantages such as small size, high power density and high efficiency. As a key component in superconducting motors, superconducting excitation coils need to work normally at a specified temperature. Whether the cooling structure of the magnet can cool the superconducting magnet to its specified operating temperature is related to the safety and reliability of the subsequent superconducting motor operation.

[0003] At present, the commonly used cooling methods for superconducting magnets are forced convection cooling and conduction cooling. Forced convection cooling uses a forced flow device (i.e., a pump body) to make the cooling medium flow through the cooling structure built into the cryogenic system. The cold is introduced into the superconducting magnet through forced convection heat exchange, and then flows back to the cold source to achieve the purpose of circulating refrigeration. Generally, no phase change of the cooling medium occurs during the cooling process, and forced convection cooling has lower cooling medium consumption. However, improper design of the cooling circuit can easily cause uneven cooling. Conduction cooling refers to the direct contact between the superconducting tape and the cold head of the refrigerator or heat transfer through the connection of the conduction cooling structure. A flexible copper structure is often added between the cold head and the superconducting tape for connection. The cold head contact conduction cooling has high efficiency, simple structure, and no risk of leakage, but it also requires a reasonable conduction cooling design to ensure the cooling effect of the superconducting magnet.

[0004] At present, there are problems with the uniformity of temperature in the conduction cooling of conventional wind power superconducting motors. Therefore, it is urgent to develop a new conduction cooling structure for wind power superconducting motors. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a novel superconducting magnet conductive cooling structure, thereby solving the technical problem of uneven cooling of the conductive cooling structure.

[0006] To achieve the above object, according to one aspect of the present invention, a novel superconducting magnet conduction cooling structure is provided, comprising: a first copper plate, a second copper plate, a connecting copper block and a copper braid;

[0007] The first copper plate and the second copper plate are arranged oppositely on the upper and lower surfaces of the superconducting magnet to form a magnet support cooling skeleton; connecting copper blocks are symmetrically arranged on both sides of the skeleton;

[0008] The connecting copper blocks are symmetrically arranged on both sides of the frame, and the connecting copper blocks include a supporting portion and an expanding portion, wherein the supporting portion is arranged between the first copper plate and the second copper plate, and the expanding portion is arranged outside the supporting portion, and the expanding portion is bent and extended toward the bottom of the second copper plate;

[0009] Both ends of the copper braid are connected to the extended parts of the connecting copper block which are symmetrically arranged.

[0010] Preferably, the expansion portion is a J-shaped structure, a longer end of which is located at the bottom of the second copper plate and is arranged parallel to the second copper plate.

[0011] Preferably, a plurality of connecting copper blocks are symmetrically arranged along both sides of the skeleton.

[0012] Preferably, a plurality of the copper braids are arranged at intervals along the bottom of the second copper plate.

[0013] Preferably, the length of the copper braid is adjustable.

[0014] Preferably, the bottom of the copper braid is connected to a cold head, and the cold head is used to generate cold energy, and the cold energy is conducted to the superconducting magnet through a cooling structure.

[0015] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0016] 1. The novel superconducting magnet conduction cooling structure proposed in the present invention expands the contact area between the magnet cooling structure and the cooling copper braid by introducing a connecting copper block structure, thereby increasing the heat conduction path inside the magnet, making the conduction cooling more uniform and improving the cooling efficiency.

[0017] 2. The novel superconducting magnet conduction cooling structure proposed in the present invention can achieve a lower temperature gradient of the magnet by introducing a copper braid structure and adjusting the length of the copper braid.

[0018] 3. The novel superconducting magnet conduction cooling structure proposed in the present invention greatly enhances the utilization of cooling medium, has obvious cooling effect, simple structure, easy processing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the novel superconducting magnet conduction cooling structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the novel superconducting magnet conduction cooling structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of connecting copper blocks in an embodiment of the novel superconducting magnet conduction cooling structure of the present invention.

[0022] In all the drawings, the same reference numerals are used to represent the same elements or structures, wherein: 1 - first copper plate; 2 - second copper plate; 3 - connecting copper block; 31 - supporting portion; 32 - expansion portion; 4 - copper braid; 5 - superconducting magnet; 6 - cold head. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 and Figure 2 As shown, the present invention proposes a novel superconducting magnet conduction cooling structure, which is composed of a first copper plate 1, a second copper plate 2, a connecting copper block 3 and a copper braid 4. The first copper plate 1 and the second copper plate 2 are relatively arranged on the upper and lower surfaces of the superconducting magnet 5, so as to form a magnet support cooling skeleton. Connecting copper blocks 3 are symmetrically arranged on both sides of the cooling skeleton, and the two ends of the copper braid 4 are connected to the symmetrically arranged connecting copper blocks 3. The bottom of the copper braid 4 is connected to a cold head 6, and the cold head 6 is used to generate cold energy, and the cold energy is conducted to the superconducting magnet 5 through the cooling structure.

[0025] Specifically, Figure 3 As shown, the connecting copper block 3 can be divided into two parts. The upper block structure is the support part 31, which is used to support the first copper plate 1 and the second copper plate 2, and also serves as a cooling path. The lower J-shaped curved part is the expansion part 32. Due to the limited space of the superconducting motor rotor, it is difficult to install the copper braid to the copper plate when the conduction cooling uses the copper braid structure. The copper braid needs to have a larger contact area with the cooled object to achieve better cooling performance. Therefore, the setting of the expansion part 32 provides an area for the conduction cooling to connect with the copper braid.

[0026] As a preferred embodiment of the present invention, a plurality of connecting copper blocks 3 are symmetrically arranged along both sides of the skeleton.

[0027] As a preferred embodiment of the present invention, a plurality of copper braids 4 are arranged at intervals along the bottom of the second copper plate 2 .

[0028] As a preferred embodiment of the present invention, the length of the copper braid 4 is adjustable.

[0029] The cold conduction path of the conduction cooling structure proposed in the present invention is: the cold head 6 is connected to the copper braid 4, the copper braid 4 is connected to the extension part 32 of the connecting copper block 3, the support part 31 of the connecting copper block 3 is connected to the first copper plate 1 and the second copper plate 2, and the first copper plate 1 and the second copper plate 2 maintain good thermal contact with the superconducting magnet 5. The cold energy is generated by the cold head 6 and is conducted to the superconducting magnet 5 via the copper braid 4, the connecting copper block 3, the first copper plate 1, and the second copper plate 2. For application scenarios requiring a low temperature gradient of the magnet, the lengths of the copper braids 4 connected to the connecting copper block 3 can be made equal to provide equal copper braid hot end temperatures, thereby achieving a low temperature gradient of the superconducting magnet.

[0030] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel superconducting magnet conduction cooling structure, characterized in that: include: A first copper plate (1), a second copper plate (2), a connecting copper block (3) and a copper braid (4); The first copper plate (1) and the second copper plate (2) are arranged on the upper and lower surfaces of the superconducting magnet (5) to form a magnet support cooling skeleton; connecting copper blocks (3) are symmetrically arranged on both sides of the skeleton; The connecting copper block (3) is symmetrically arranged on both sides of the frame, and the connecting copper block (3) comprises a supporting portion (31) and an expanding portion (32), wherein the supporting portion (31) is arranged between the first copper plate (1) and the second copper plate (2), and the expanding portion (32) is arranged outside the supporting portion (31), and the expanding portion (32) bends and extends toward the bottom of the second copper plate (2); Both ends of the copper braid (4) are connected to the extended portions (32) of the connecting copper block (3) which are symmetrically arranged.

2. A novel superconducting magnet conduction cooling structure according to claim 1, characterized in that: The expansion portion (32) is a J-shaped structure, with the longer end thereof being located at the bottom of the second copper plate (2) and being arranged parallel to the second copper plate (2).

3. A novel superconducting magnet conduction cooling structure according to claim 2, characterized in that: A plurality of connecting copper blocks (3) are symmetrically arranged along both sides of the frame.

4. A novel superconducting magnet conduction cooling structure according to claim 3, characterized in that: A plurality of the copper braids (4) are arranged at intervals along the bottom of the second copper plate (2).

5. A novel superconducting magnet conduction cooling structure according to claim 4, characterized in that: The length of the copper braid (4) is adjustable.

6. A novel superconducting magnet conduction cooling structure according to claim 5, characterized in that: The bottom of the copper braid (4) is connected to a cold head (6), and the cold head (6) is used to generate cold energy, and the cold energy is conducted to the superconducting magnet (5) through a cooling structure.

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